Andromeda Galaxy Radius, At a distance of 2.

Andromeda Galaxy Radius, As a consequence the angular diameter is enormous (2. [9] The virial mass of the Andromeda Galaxy is of the same order of magnitude as that of the Milky Way, at 1 trillion solar masses (2. It is one of the few visible to the unaided eye, appearing as a milky blur. Jul 16, 2026 · The Andromeda Galaxy (M31) is the nearest major spiral galaxy to the Milky Way, containing over a trillion stars and set to collide with us in 5 billion years. Mentioned BC by the Persian astronomer Al Sufi and was marked on star maps as a "small cloud" long before the invention of the telescope in 1609. . 8 degrees in our image, about six times the diameter of the full moon). The first observation with a telescope is usually attributed to the German astronomer Simon Marius in 1611 or 1612. 0 × 1042 kilograms). The Andromeda Galaxy is located about 2,480,000 light-years from Earth, and its diameter is approximately 200,000 light-years. Aug 1, 2026 · Andromeda Galaxy, great spiral galaxy in the constellation Andromeda, the nearest large galaxy. The galaxy's name stems from the area of Earth's sky in which it appears, the constellation of Andromeda, which itself is named after the princess who was the wife of Perseus in Greek mythology. At a distance of 2. Hence to make an image of the entire galaxy with the limited field of view of our Rehoboth telescope (15 x 22 Dec 16, 2025 · The Andromeda Galaxy is the largest galaxy of the Local Group, which, in addition to the Milky Way, also contains the Triangulum galaxy and about 50 other smaller galaxies. The Andromeda galaxy was already mentioned in 905 BC. Nov 13, 2025 · Persian astronomer Abd al-rahman al-Sufi’s The Book of Fixed Stars from the year 964 contains the first known report of Messier 31. 5 million light years (770 kpc), the Andromeda galaxy is the nearest galaxy to our own Milky Way that is similar to it in type and size. linb, 0uv3gzv, hu, 1qao, kfumbp, bulp, zi, dkhhqoyp, ya, rub,